Automatic gain control (agc) for assistance for sidelink positioning reference signals (sl-prs)

Abstract

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits or receives a first automatic gain control (AGC) reference signal on one or more first subcarriers of an AGC training symbol of a slot, wherein a position of the one or more first subcarriers is mapped to a first set of symbols of the slot configured for a first sidelink positioning reference signal (SL-PRS) resource, and transmits or receives the first SL-PRS resource on the first set of symbols of the slot.

What is claimed is: 
     
         1 . A method of wireless communication performed by a user equipment (UE), comprising:
 transmitting or receiving a first sidelink positioning reference signal (SL-PRS) resource, wherein the first SL-PRS resource is configured with at least a comb size and a number of symbols in a slot, and wherein a first-occurring symbol of the number of symbols of the first SL-PRS resource is configured as an automatic gain control (AGC) training symbol for the first SL-PRS resource.   
     
     
         2 . The method of  claim 1 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource correspond to a comb size and a number of symbols of a downlink positioning reference signal (DL-PRS) resource or an uplink sounding reference signal (UL-SRS) resource, and   the first-occurring symbol of the number of symbols of the first SL-PRS resource corresponds to a first-occurring symbol of the number of symbols of the DL-PRS resource or the UL-SRS resource.   
     
     
         3 . The method of  claim 2 , wherein:
 the comb size and the number of symbols of the DL-PRS resource is one of {2,2}, {2,4}, {2,6}, {2,12}, {4,4}, {4,12}, {6,6}, {6,12}, or {12,12}, or   the comb size and the number of symbols of the UL-SRS resource is one of {2,1}, {2,2}, {2,4}, {4,2}, {4,4}, {4,8}, {4,12}, {8,4}, {8,8}, and {8,12}.   
     
     
         4 . The method of  claim 1 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource are based on a comb size and a number of symbols of a DL-PRS resource or an UL-SRS resource, and   the first-occurring symbol of the number of symbols of the first SL-PRS resource is in addition to a first-occurring symbol of the number of symbols of the DL-PRS resource or the UL-SRS resource.   
     
     
         5 . The method of  claim 4 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource is based on the comb size and the number of symbols of the DL-PRS resource and the comb size and the number of symbols of the first SL-PRS resource is one of {2,3}, {2,5}, {2,7}, {2,13}, {4,5}, {4,13}, {6,7}, {6,13}, and {12,13}, or   the comb size and the number of symbols of the first SL-PRS resource is based on the comb size and the number of symbols of the UL-SRS resource and the comb size and the number of symbols of the first SL-PRS resource is one of {2,2}, {2,3}, {2,5}, {4,3}, {4,5}, {4,9}, {4,13}, {8,5}, {8,9}, and {8,13}.   
     
     
         6 . The method of  claim 4 , wherein the first-occurring symbol of the number of symbols of the first SL-PRS resource is a repetition of another symbol of the first SL-PRS resource. 
     
     
         7 . The method of  claim 1 , further comprising:
 transmitting or receiving a second SL-PRS resource, wherein the second SL-PRS resource is configured with at least a comb size and a number of symbols, and wherein a first-occurring symbol of the number of symbols of the second SL-PRS resource is configured as an AGC training symbol for the second SL-PRS resource.   
     
     
         8 . The method of  claim 1 , further comprising:
 receiving configuration information for the first SL-PRS resource, wherein the configuration information indicates at least the comb size and the number of symbols of the first SL-PRS resource.   
     
     
         9 . The method of  claim 8 , wherein the configuration information is received from:
 a location server,   a serving base station, or   another UE.   
     
     
         10 . The method of  claim 1 , wherein transmitting or receiving the first SL-PRS resource comprises:
 measuring the AGC training symbol; and   measuring the first SL-PRS resource based on measurement of the AGC training symbol.   
     
     
         11 . The method of  claim 1 , wherein transmitting or receiving the first SL-PRS resource comprises:
 transmitting the first SL-PRS resource, including the AGC training symbol.   
     
     
         12 . A method of wireless communication performed by a user equipment (UE), comprising:
 transmitting or receiving a first automatic gain control (AGC) reference signal on one or more first subcarriers of an AGC training symbol of a slot, wherein a position of the one or more first subcarriers is mapped to a first set of symbols of the slot configured for a first sidelink positioning reference signal (SL-PRS) resource; and   transmitting or receiving the first SL-PRS resource on the first set of symbols of the slot.   
     
     
         13 . The method of  claim 12 , wherein:
 a number of the one or more first subcarriers is equal to a number of the first set of symbols, and   the position of the one or more subcarriers indicates a position of the first set of symbols.   
     
     
         14 . The method of  claim 12 , wherein:
 the one or more first subcarriers are a single subcarrier, and   the position of the single subcarrier indicates a first-occurring symbol of the first set of symbols.   
     
     
         15 . The method of  claim 12 , wherein the AGC training symbol is followed by an AGC processing gap of one or more symbols of the slot. 
     
     
         16 . The method of  claim 12 , wherein the AGC training symbol is a first-occurring symbol of the slot. 
     
     
         17 . The method of  claim 12 , further comprising:
 transmitting or receiving a second AGC reference signal on one or more second subcarriers of the AGC training symbol of the slot, wherein a position of the one or more second subcarriers is mapped to a second set of symbols of the slot configured for a second SL-PRS resource; and   transmitting or receiving the second SL-PRS resource on the second set of symbols of the slot.   
     
     
         18 . The method of  claim 12 , further comprising:
 receiving configuration information for at least the AGC training symbol and the first SL-PRS resource.   
     
     
         19 . The method of  claim 18 , wherein the configuration information is received from:
 a location server,   a serving base station, or   another UE.   
     
     
         20 . The method of  claim 12 , wherein transmitting or receiving the first AGC reference signal comprises:
 measuring the first AGC reference signal on the one or more first subcarriers of the AGC training symbol; and   
     
     
         21 . The method of  claim 20 , wherein transmitting or receiving the first SL-PRS resource comprises:
 measuring the first SL-PRS resource based on measurement of the first AGC reference signal.   
     
     
         22 . A user equipment (UE), comprising:
 a memory;   at least one transceiver; and   at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:
 transmit or receive, via the at least one transceiver, a first sidelink positioning reference signal (SL-PRS) resource, wherein the first SL-PRS resource is configured with at least a comb size and a number of symbols in a slot, and wherein a first-occurring symbol of the number of symbols of the first SL-PRS resource is configured as an automatic gain control (AGC) training symbol for the first SL-PRS resource. 
   
     
     
         23 . The UE of  claim 22 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource correspond to a comb size and a number of symbols of a downlink positioning reference signal (DL-PRS) resource or an uplink sounding reference signal (UL-SRS) resource, and   the first-occurring symbol of the number of symbols of the first SL-PRS resource corresponds to a first-occurring symbol of the number of symbols of the DL-PRS resource or the UL-SRS resource.   
     
     
         24 . The UE of  claim 23 , wherein:
 the comb size and the number of symbols of the DL-PRS resource is one of {2,2}, {2,4}, {2,6}, {2,12}, {4,4}, {4,12}, {6,6}, {6,12}, or {12,12}, or   the comb size and the number of symbols of the UL-SRS resource is one of {2,1}, {2,2}, {2,4}, {4,2}, {4,4}, {4,8}, {4,12}, {8,4}, {8,8}, and {8,12}.   
     
     
         25 . The UE of  claim 22 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource are based on a comb size and a number of symbols of a DL-PRS resource or an UL-SRS resource, and   the first-occurring symbol of the number of symbols of the first SL-PRS resource is in addition to a first-occurring symbol of the number of symbols of the DL-PRS resource or the UL-SRS resource.   
     
     
         26 . The UE of  claim 25 , wherein:
 the comb size and the number of symbols of the first SL-PRS resource is based on the comb size and the number of symbols of the DL-PRS resource and the comb size and the number of symbols of the first SL-PRS resource is one of {2,3}, {2,5}, {2,7}, {2,13}, {4,5}, {4,13}, {6,7}, {6,13}, and {12,13}, or   the comb size and the number of symbols of the first SL-PRS resource is based on the comb size and the number of symbols of the UL-SRS resource and the comb size and the number of symbols of the first SL-PRS resource is one of {2,2}, {2,3}, {2,5}, {4,3}, {4,5}, {4,9}, {4,13}, {8,5}, {8,9}, and {8,13}.   
     
     
         27 . The UE of  claim 25 , wherein the first-occurring symbol of the number of symbols of the first SL-PRS resource is a repetition of another symbol of the first SL-PRS resource. 
     
     
         28 . A user equipment (UE), comprising:
 a memory;   at least one transceiver; and   at least one processor communicatively coupled to the memory and the at least one transceiver, the at least one processor configured to:
 transmit or receive, via the at least one transceiver, a first automatic gain control (AGC) reference signal on one or more first subcarriers of an AGC training symbol of a slot, wherein a position of the one or more first subcarriers is mapped to a first set of symbols of the slot configured for a first sidelink positioning reference signal (SL-PRS) resource; and 
 transmit or receive, via the at least one transceiver, the first SL-PRS resource on the first set of symbols of the slot. 
   
     
     
         29 . The UE of  claim 28 , wherein:
 a number of the one or more first subcarriers is equal to a number of the first set of symbols, and   the position of the one or more subcarriers indicates a position of the first set of symbols.   
     
     
         30 . The UE of  claim 28 , wherein:
 the one or more first subcarriers are a single subcarrier, and   the position of the single subcarrier indicates a first-occurring symbol of the first set of symbols.